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Refractory high-entropy alloy material with high plasticity and low neutron absorption section and preparation method thereof

A high-entropy alloy and high plasticity technology, applied in the field of high-entropy alloys, can solve problems such as high theoretical melting point, high room temperature yield strength and deformation plasticity, and poor room temperature plasticity

Inactive Publication Date: 2021-04-27
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems of high density of refractory high-entropy alloys and poor plasticity at room temperature in the prior art, the present invention provides a refractory high-entropy alloy material with high plasticity and low neutron absorption cross-section and a preparation method thereof. The AlVTiNbZr high-entropy alloy is obtained by the method, which has a high theoretical melting point, low alloy density, high room temperature yield strength and deformation plasticity, which can resist deformation failure during service and bring sufficient safety margin; AlVTiNbZr high-entropy alloy is Single-phase BCC structure with low thermal neutron absorption coefficient and higher safety factor than traditional Zr alloys

Method used

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  • Refractory high-entropy alloy material with high plasticity and low neutron absorption section and preparation method thereof
  • Refractory high-entropy alloy material with high plasticity and low neutron absorption section and preparation method thereof

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Embodiment 1

[0020] Example 1: Refractory AlVTiNbZr high-entropy alloy material with high plasticity and low neutron absorption cross section, recorded as Nb according to atomic percentage 31 Ti 37-x Zr 26 Al 6 V x , where x=3, the AlVTiNbZr high-entropy alloy has a single-phase body-centered cubic structure;

[0021] A method for preparing a refractory high-entropy alloy material with high plasticity and low neutron absorption cross-section, the specific steps are as follows:

[0022] (1) Use sandpaper or grinder to polish and remove the oxide scales on five kinds of raw material surfaces of Al, V, Ti, Nb and Zr, and use ethanol to clean up; wherein Al, V, Ti, Nb, Zr are all purity greater than 99.77wt% Block;

[0023] (2) Five raw materials of Al, V, Ti, Nb and Zr are sequentially added into the vacuum arc melting furnace in order of melting point from low to high; ensure that the low melting point material is located at the bottom of the melting vessel;

[0024] (3) Vacuum to 6×10...

Embodiment 2

[0027] Embodiment 2: Refractory AlVTiNbZr high-entropy alloy material with high plasticity and low neutron absorption cross section, recorded as Nb according to atomic percentage 31 Ti 37-x Zr 26 Al 6 V x , where x=5, the AlVTiNbZr high-entropy alloy has a single-phase BCC structure;

[0028] A method for preparing a refractory high-entropy alloy material with high plasticity and low neutron absorption cross-section, the specific steps are as follows:

[0029] (1) Use sandpaper or grinder to polish and remove the oxide scales on five kinds of raw material surfaces of Al, V, Ti, Nb and Zr, and use ethanol to clean up; wherein Al, V, Ti, Nb, Zr are all purity greater than 99.77wt% Block;

[0030] (2) Five raw materials of Al, V, Ti, Nb and Zr are sequentially added into the vacuum arc melting furnace in order of melting point from low to high; ensure that the low melting point material is located at the bottom of the melting vessel;

[0031] (3) Vacuum to 6×10 -2 Below Pa...

Embodiment 3

[0034] Embodiment 3: Refractory AlVTiNbZr high-entropy alloy material with high plasticity and low neutron absorption cross section, recorded as Nb according to atomic percentage 31 Ti 37-x Zr 26 Al 6 V x , where x=7, the AlVTiNbZr high-entropy alloy has a single-phase BCC structure;

[0035] A method for preparing a refractory high-entropy alloy material with high plasticity and low neutron absorption cross-section, the specific steps are as follows:

[0036](1) Use sandpaper or grinder to polish and remove the oxide scales on five kinds of raw material surfaces of Al, V, Ti, Nb and Zr, and use ethanol to clean up; wherein Al, V, Ti, Nb, Zr are all purity greater than 99.77wt% Block;

[0037] (2) Five raw materials of Al, V, Ti, Nb and Zr are sequentially added into the vacuum arc melting furnace in order of melting point from low to high; ensure that the low melting point material is located at the bottom of the melting vessel;

[0038] (3) Vacuum to 6×10 -2 Below Pa,...

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Abstract

The invention relates to a refractory high-entropy alloy material with high plasticity and low neutron absorption cross section and a preparation method thereof, and belongs to the technical field of high-entropy alloys. The high-entropy alloy material is AlVTiNbZr high-entropy alloy, wherein the atomic percent of an aluminum element is 5%-10%, the atomic percent of a V element is 3%-15%, the atomic percent of a Ti element is 20%-40%, the atomic percent of an Nb element is 25%-35%, and the atomic percent of a Zr element is 20%-35%. The AlVTiNbZr high-entropy alloy is of a single-phase BCC structure. The AlVTiNbZr high-entropy alloy is obtained in a vacuum arc melting mode, has a high theoretical melting point, low alloy density, high room-temperature yield strength and deformation plasticity, can resist deformation failure in the service process, and brings sufficient safety margin in the service process.

Description

technical field [0001] The invention relates to a refractory high-entropy alloy material with high plasticity and low neutron absorption cross-section and a preparation method thereof, belonging to the technical field of high-entropy alloys. Background technique [0002] Refractory high-entropy alloys are characterized by using all or part of high melting point elements such as Mo, Nb, Ta, W, Ti, Zr, V, etc., and the prepared alloys have good high temperature properties. However, the mixed use or mixed addition of the above-mentioned various elements makes the alloy generally have the disadvantages of high density and poor room temperature plasticity while having good high-temperature properties, which limits the potential application range of this alloy to a certain extent, so it is urgent to design an alloy. A refractory high-entropy alloy with low density, high yield strength and good deformation plasticity. [0003] After the traditional Zr alloy cladding material is ir...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02G21C3/07
CPCC22C1/02C22C30/00G21C3/07Y02E30/30
Inventor 谭军黄瑞李威董权吴璐
Owner CHONGQING UNIV
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